Confirmed [Indev 0.53] Missing Habitat Data for the first Pokemon caught in an area

[RafaCP]

Well i caugh a slowpoke on Slowpoke Well then when i see the pokedex say its unknown location BUT I CAUGH IT ON SLOWPOKE WELL FIX THAT!

 

[jianmingyong]

Well i caugh a slowpoke on Slowpoke Well then when i see the pokedex say its unknown location BUT I CAUGH IT ON SLOWPOKE WELL FIX THAT!

Well, this is just because the location for Slowpoke Well encounter is not registered in your pokédex so it remain unknown.... ( I called it the non spoiler habitat pokédex we have )
You could just battle a few more pokemon in that location and it might appear.

 

[Fanta]

All he needs to do is open the pokedex, go to slowpoke and see that it is working fine, this only happens when the caught pokemon is the first to be caught in an area and only happens in the pokedex screen that pops up after catching a new pokemon.
Confirmed in 0.53